Hubble is helping astronomers precisely calculate the age of the universe by providing accurate distances to galaxies, an important prerequisite for calculating age. Hubble measures the distances to neighboring galaxies by finding accurate "milepost markers," a special class of pulsating star called Cepheid variables. These, in turn, are being used to calibrate more remote milepost markers.
Can we say the following?
Hubble discovers black holes.
OPTIONS:
- yes
- no

no


Olson, 62, previously worked as a partner at Ernst & Young LLP, as a Minnesota bank president and as a congressional aide, before joining the Fed board in 2001, to serve a term ending in 2010.
Can we say the following?
Olson is a member of the Fed board.
OPTIONS:
- yes
- no

yes


THE presidents of Honduras and El Salvador were set yesterday to begin two days of talks in San Salvador, amid continuing tension in border areas.
Can we say the following?
Honduras and El Salvador entered a dispute over their borders.
OPTIONS:
- yes
- no

yes


No case of indigenously acquired rabies infection has been confirmed in man or any animal species during the past 2 years.
Can we say the following?
A case of rabies was confirmed.
OPTIONS:
- yes
- no


no